First it needs more quilting SID around large areas. I use large straight pins when there appears to be some excess fabric to work in. Put them in just ahead of the area you are quilting. This way you can ease in any
fullness with the quilting. Dont rely on the walking foot to do all the work for you.
Use the patchwork as a guide for the amount of quilting you need and not the recommendation of the batting manufacturer. I am sure the quilt will droop if you don't put more quilting within the blocks. It all depend on how the quilt is to be used. If as a wall hanging then lots more quilting may be needed.